:root {
  --bg: #05060c;
  --bg-2: #0a0c16;
  --ink: #f4efe4;
  --ink-soft: rgba(244, 239, 228, 0.72);
  --ink-dim: rgba(244, 239, 228, 0.46);
  --gold: #d7b57a;
  --gold-2: #9a7540;
  --gold-soft: rgba(215, 181, 122, 0.18);
  --seal: #c24b3c;
  --line: rgba(215, 181, 122, 0.22);
  --glass: rgba(8, 10, 18, 0.62);
  --nav-h: 76px;
  --max: 1180px;
  --serif: "Noto Serif SC", "Songti SC", "STSong", "Source Han Serif SC", serif;
  --sans: "Outfit", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html.is-locked,
html.is-locked body {
  overflow: hidden;
}

html.is-locked .nav {
  opacity: 0;
  pointer-events: none;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 4px;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

::selection {
  background: rgba(215, 181, 122, 0.28);
  color: #fff;
}

.cosmos {
  position: fixed;
  inset: -8%;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(88, 70, 160, 0.22), transparent 42%),
    radial-gradient(ellipse at 80% 80%, rgba(32, 90, 140, 0.16), transparent 46%),
    url("../assets/cosmos-bg.jpg") center / cover no-repeat;
  z-index: -2;
  animation: cosmosDrift 40s ease-in-out infinite alternate;
}

.cosmos::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 6, 12, 0.28), rgba(5, 6, 12, 0.78) 48%, #05060c 100%),
    radial-gradient(circle at 50% 0%, transparent 20%, rgba(5, 6, 12, 0.55) 100%);
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 80;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.9'/%3E%3C/svg%3E");
}

.skip {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--gold);
  color: #1a140c;
}

.skip:focus {
  top: 16px;
}

.wrap {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s;
}

.nav.is-scrolled {
  background: rgba(5, 6, 12, 0.78);
  border-bottom-color: var(--line);
  backdrop-filter: blur(18px);
}

.nav-inner {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1;
}

.brand-name {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-name strong {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.28em;
}

.brand-name span {
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
  transition: color 0.25s;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--gold);
}

.nav-cta {
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--gold) !important;
  letter-spacing: 0.16em !important;
}

.nav-toggle {
  display: none;
  min-width: 72px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.32em;
}

.drawer {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: #05060c;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease);
}

.drawer.is-open {
  opacity: 1;
  pointer-events: auto;
}

.drawer nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.drawer a {
  font-family: var(--serif);
  font-size: clamp(32px, 8vw, 56px);
  letter-spacing: 0.18em;
  transition: color 0.25s;
}

.drawer a:hover,
.drawer a:focus-visible {
  color: var(--gold);
}

.drawer-close {
  position: absolute;
  top: 22px;
  right: 22px;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.hero {
  position: relative;
  min-height: calc(100svh - var(--nav-h));
  display: grid;
  align-items: center;
  padding: 24px 0 64px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.38em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 36px;
  height: 1px;
  background: var(--gold);
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(56px, 8vw, 108px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: 0.12em;
  background: linear-gradient(180deg, #fff6e4 18%, #e8d7b0 46%, #b98a4a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.title-line {
  width: 52px;
  height: 1px;
  margin: 20px 0 0;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.spine {
  position: absolute;
  left: 18px;
  top: 50%;
  margin: 0;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 0.45em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

.stars {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.st {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
  animation: twinkle 3.4s ease-in-out infinite;
}

.st1 { left: 12%; top: 18%; }
.st2 { left: 28%; top: 9%; width: 3px; height: 3px; animation-delay: 0.6s; }
.st3 { left: 63%; top: 14%; animation-delay: 1.1s; }
.st4 { left: 88%; top: 22%; width: 5px; height: 5px; animation-delay: 1.8s; }
.st5 { left: 18%; top: 62%; animation-delay: 0.4s; }
.st6 { left: 76%; top: 48%; width: 3px; height: 3px; animation-delay: 2.2s; }
.st7 { left: 46%; top: 78%; animation-delay: 1.4s; }
.st8 { left: 90%; top: 68%; animation-delay: 2.8s; }

.hero-lead {
  max-width: 34em;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: clamp(16px, 1.6vw, 19px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--gold);
  font-size: 13px;
  letter-spacing: 0.22em;
  transition: transform 0.3s var(--ease), background 0.3s, color 0.3s;
}

.btn-solid {
  background: var(--gold);
  color: #1b140c;
}

.btn-solid:hover {
  transform: translateY(-2px);
  background: #e4c894;
}

.btn-ghost:hover {
  background: var(--gold-soft);
  transform: translateY(-2px);
}

.hero-meta {
  display: flex;
  gap: 28px;
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.hero-meta b {
  display: block;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.hero-meta span {
  color: var(--ink-dim);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.hero-stage {
  position: relative;
  min-height: 620px;
}

.hero-bag {
  position: absolute;
  width: min(92%, 520px);
  left: 50%;
  top: 46%;
  transform: translate(calc(-50% + var(--mx, 0px)), calc(-54% + var(--my, 0px)));
  filter: drop-shadow(0 30px 60px rgba(80, 50, 160, 0.28));
  animation: float 7.5s ease-in-out infinite;
  z-index: 1;
}

.orb {
  position: absolute;
  left: 50%;
  top: 48%;
  width: 340px;
  height: 340px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(215, 181, 122, 0.18);
  border-radius: 50%;
  z-index: 0;
}

.orb::before,
.orb::after {
  content: "";
  position: absolute;
  inset: -28px;
  border: 1px solid rgba(215, 181, 122, 0.1);
  border-radius: 50%;
}

.orb::after {
  inset: -56px;
  border-color: rgba(215, 181, 122, 0.06);
}

.seal {
  position: absolute;
  right: 8%;
  top: 8%;
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 1px solid var(--seal);
  color: var(--seal);
  font-family: var(--serif);
  font-size: 22px;
  transform: rotate(12deg);
  z-index: 3;
}

.hero-phone {
  position: absolute;
  right: 4%;
  bottom: 0;
  width: 250px;
  z-index: 2;
  transform: rotate(8deg);
  animation: float 8.5s ease-in-out infinite reverse;
}

.ticker {
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: rgba(5, 6, 12, 0.42);
}

.ticker-track {
  display: flex;
  width: max-content;
  gap: 0;
  animation: ticker 32s linear infinite;
}

.ticker-track span {
  padding: 16px 28px;
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: 0.36em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.ticker-track i {
  width: 5px;
  height: 5px;
  margin: auto 0;
  border-radius: 50%;
  background: var(--gold);
  display: block;
}

.section,
.belief,
#use,
#top {
  scroll-margin-top: calc(var(--nav-h) - 1px);
}

.section {
  padding: 108px 0;
  position: relative;
}

.section-kicker {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
}

.section h2 {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-size: clamp(32px, 4.6vw, 56px);
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.2;
}

.section-lead {
  max-width: 40em;
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: 16px;
}

.head-row {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  align-items: end;
  margin-bottom: 56px;
}

.gallery {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr 0.9fr;
  gap: 22px;
  align-items: end;
  perspective: 1200px;
  padding: 12px 8px 28px;
}

.device {
  margin: 0;
}

.device figcaption {
  margin-top: 16px;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--ink-dim);
}

.gallery-hint {
  display: none;
}

.device-frame {
  position: relative;
  padding: 10px;
  border-radius: 36px;
  background: linear-gradient(160deg, rgba(228, 210, 170, 0.28), rgba(40, 36, 48, 0.9) 32%, #090b12);
  box-shadow:
    0 40px 80px rgba(0, 0, 0, 0.45),
    inset 0 0 0 1px rgba(215, 181, 122, 0.18);
}

.device-screen {
  overflow: hidden;
  border-radius: 26px;
  aspect-ratio: 9 / 19.1;
  background: #05060c;
}

.device-screen img {
  width: 100%;
  height: 132%;
  object-fit: cover;
  object-position: center 12%;
  margin-top: -4%;
}

.device:nth-child(1) {
  transform: translateY(28px) rotateY(14deg) rotate(-4deg);
}

.device:nth-child(2) {
  transform: translateY(0) scale(1.04);
  z-index: 2;
}

.device:nth-child(3) {
  transform: translateY(28px) rotateY(-14deg) rotate(4deg);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.step {
  padding: 32px 28px 36px;
  border: 1px solid var(--line);
  background: rgba(8, 10, 18, 0.5);
  min-height: 280px;
  transition: border-color 0.35s, transform 0.35s var(--ease), background 0.35s;
}

.step:hover {
  border-color: rgba(215, 181, 122, 0.55);
  transform: translateY(-6px);
  background: rgba(18, 16, 28, 0.72);
}

.step-index {
  font-family: var(--serif);
  font-size: 28px;
  color: var(--gold);
  letter-spacing: 0.2em;
}

.step h3 {
  margin: 28px 0 12px;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.2em;
}

.step p {
  margin: 0;
  color: var(--ink-soft);
}

.belief {
  padding: 0;
}

.belief-panel {
  width: min(calc(100% - 48px), 980px);
  margin: 0 auto;
  padding: 88px 24px;
  text-align: center;
  border-block: 1px solid var(--line);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(215, 181, 122, 0.08), transparent 48%),
    rgba(5, 6, 12, 0.28);
}

.belief-panel .seal-lg {
  width: 64px;
  height: 64px;
  margin: 0 auto 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--seal);
  color: var(--seal);
  font-family: var(--serif);
  font-size: 26px;
}

.belief-panel h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(36px, 5vw, 64px);
  letter-spacing: 0.16em;
}

.belief-panel p {
  max-width: 36em;
  margin: 24px auto 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.about-card {
  padding: 36px 32px;
  border: 1px solid var(--line);
  background: rgba(8, 10, 18, 0.42);
}

.about-card h3 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 28px;
  letter-spacing: 0.08em;
}

.about-card .en {
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.28em;
}

.about-card p {
  margin: 22px 0 0;
  color: var(--ink-soft);
}

.facts {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.facts div {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.facts b {
  color: var(--gold);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  white-space: nowrap;
}

.facts a {
  color: var(--gold);
}

.cta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 36px 32px;
  border: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(215, 181, 122, 0.08), transparent 42%),
    rgba(8, 10, 18, 0.5);
}

.cta h3 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 28px;
  letter-spacing: 0.12em;
}

.cta p {
  margin: 0;
  color: var(--ink-soft);
}

.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-brand strong {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  font-style: normal;
  letter-spacing: 0.04em;
  line-height: 1.7;
  text-align: right;
}

.footer-meta a {
  color: var(--gold);
}

.footer-beian {
  width: min(calc(100% - 48px), var(--max));
  margin: 20px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  text-align: center;
  letter-spacing: 0.06em;
}

.footer-beian a {
  color: var(--gold);
}

.footer-beian a:hover,
.footer-beian a:focus-visible {
  color: var(--ink);
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  transform: translateY(18px);
  transition: transform 0.9s var(--ease);
}

.js .reveal.is-in {
  transform: none;
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

@keyframes cosmosDrift {
  from { transform: scale(1.04) translate3d(-1%, -1%, 0); }
  to { transform: scale(1.12) translate3d(1.5%, 1%, 0); }
}

@keyframes float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -14px; }
}

@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@keyframes twinkle {
  0%, 100% { opacity: 0.25; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.6); }
}

@media (max-width: 980px) {
  .hero-grid,
  .about-grid,
  .gallery,
  .steps,
  .head-row {
    grid-template-columns: 1fr;
  }

  .head-row,
  .cta,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-meta {
    text-align: left;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .hero {
    min-height: 0;
    padding-top: 8px;
  }

  .hero-stage {
    min-height: 340px;
    order: -1;
  }

  .hero-bag {
    width: min(72%, 300px);
  }

  .hero-phone,
  .spine,
  .orb,
  .seal {
    display: none;
  }

  .device:nth-child(1),
  .device:nth-child(2),
  .device:nth-child(3) {
    transform: none;
  }

  .gallery {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 16px;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .gallery::-webkit-scrollbar {
    display: none;
  }

  .device {
    flex: 0 0 min(72vw, 280px);
    scroll-snap-align: center;
  }

  .gallery-hint {
    display: block;
    margin: 16px 0 0;
    text-align: center;
    color: var(--ink-dim);
    font-size: 12px;
    letter-spacing: 0.22em;
  }
}

@media (max-width: 640px) {
  .wrap,
  .nav-inner,
  .belief-panel,
  .footer-beian {
    width: min(calc(100% - 32px), var(--max));
  }

  .hero {
    padding-top: 8px;
  }

  .hero h1 {
    letter-spacing: 0.08em;
  }

  .hero-meta {
    flex-direction: column;
    gap: 16px;
  }

  .hero-phone {
    display: none;
  }

  .spine {
    display: none;
  }

  .hero-stage {
    min-height: 280px;
  }

  .hero-bag {
    width: min(78%, 280px);
  }

  .section {
    padding: 80px 0;
  }

  .cta,
  .about-card,
  .step {
    padding: 24px;
  }

  .facts div {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cosmos,
  .hero-bag,
  .hero-phone,
  .ticker-track,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
}